Driving anger and its derived aggressive behaviors may affect driving negatively. In order to assess this kind of behaviors it is necessary to have reliable and valid psycho­metric instruments. One of the most one is the Driving An­ger Expression Inventory, which in its long form is composed of 50 items. It makes it an excessive long questionnaire. The aim of the present research was to de­velop a brief version of the Driving An­ger Expression Inventory to assess in few minutes the frequency of different types of anger expression be­hind the wheel. Therefore a sample composed of 441 driv­ers who completed the long version of the Driving An­ger Expression Inventory. After­wards, those items with highest factor loadings in the Con­firmatory Factor Analysis were chosen to compose the new short form. Finally, a 22-item version was proposed. It fitted satisfactorily in five factors, similarly to the long form: Verbal anger expression (α = .84); Physical anger expression (α = .76); Expression through the vehicle (α = .74); Displaced expression (α = .78), and Adaptative ex­pression (α = .77). Implications of the results are dis­cussed.

Herrero-Fernández, D. (2011). Psychometric Adaptation of the Driving Anger Expression Inventory in a Spanish sample. Differences by Age and Gender. Transportation Research Part F: Traffic Psychology and Behaviour, 14, 324–329. ttps://doi.org/10.1016/j.trf.2011.03.001

Herrero-Fernández, D. (2012). Análisis de diferencias en la magnitud de la ira provocada por distintos eventos del tráfico y en las formas de expresarla [Analysis of the Differences by Age and Gender in the Magnitude of Anger Provoked by Different Traffic Events and the Ways to Express it]. Securitas Vialis, 13, 11–23.

Herrero-Fernández, D. (2013a). Do People Change behind the Wheel? A Comparison of Anger and Aggression on and off the Road. Transportation Research Part F: Traffic Psychology and Behaviour, 21, 66–74. https://doi.org/10.1016/j.trf.2013.09.008

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